<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="static/plugins/bootstrap-3.4.1-dist/css/bootstrap.min.css"><style>
    .btn-outline-black {
        color: black;
        background-color: transparent;
        background-image: none;
        border-color: black;
        border-radius: 30px !important;

    }
</style>
</head>
<body>
<div class="container">
    <div class="jumbotron">
        <h1>图书管理系统</h1>
        <div class="text-center">
            <p>
                <button onclick="toClient()" class="btn btn-lg btn-outline-black">用户登录</button>
            </p>
            <p>
                <button onclick="toAssistant()" class="btn btn-lg btn-outline-black">管理员登录</button>
            </p>
            <p>
                <button onclick="toClientRegister()" class="btn btn-lg btn-outline-black">用户注册</button>
            </p>
            <p>
                <button onclick="toAssistantRegister()" class="btn btn-lg btn-outline-black">管理员注册</button>
            </p>
        </div>
    </div>
</div>
<script src="static/js/jquery.js" type="text/javascript"></script>
<script src="static/plugins/bootstrap-3.4.1-dist/js/bootstrap.min.js" type="text/javascript"></script>
<script>
    function toClient() {
        const getval = "client";
        window.location.href = "login.html?user=" + getval;
    }

    function toAssistant() {
        const getval = "assistant";
        window.location.href = "login.html?user=" + getval;
    }

    function toClientRegister() {
        window.location.href = "ClientRegister.html";
    }

    function toAssistantRegister() {
        window.location.href = "AssistantRegister.html";
    }
</script>
</body>
</html>
